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clk: imx: gate2: Add locking in is_enabled op 

Protect against enabling/disabling the gate while we're
checking if it is enabled.

Signed-off-by: Abel Vesa <abel.vesa@nxp.com>
Reviewed-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
This commit is contained in:
Abel Vesa 2020-10-28 14:59:02 +02:00 committed by Shawn Guo
parent bcd418a632
commit 65188f0745
1 changed files with 9 additions and 1 deletions
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10
drivers/clk/imx/clk-gate2.c
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@ -101,9 +101,17 @@ static int clk_gate2_reg_is_enabled(void __iomem *reg, u8 bit_idx,
static int clk_gate2_is_enabled(struct clk_hw *hw)
{
struct clk_gate2 *gate = to_clk_gate2(hw);
unsigned long flags;
int ret = 0;
return clk_gate2_reg_is_enabled(gate->reg, gate->bit_idx,
spin_lock_irqsave(gate->lock, flags);
ret = clk_gate2_reg_is_enabled(gate->reg, gate->bit_idx,
gate->cgr_val, gate->cgr_mask);
spin_unlock_irqrestore(gate->lock, flags);
return ret;
}
static void clk_gate2_disable_unused(struct clk_hw *hw)